The warning currently reads:
No board defconfig name specified, check your
BR2_TARGET_UBOOT_DEFCONFIG setting.
It should read:
No board defconfig name specified, check your
BR2_TARGET_UBOOT_BOARD_DEFCONFIG setting.
Signed-off-by: Christian Stewart <christian@paral.in>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
We need to avoid failing of copy of custom dts using cp -f <>
command. So, just qstrip the variable as is done for other
configuration options.
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Tested-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Similaly to Linux, this patch adds the ability to copy in and build
out-of-source device tree sources during a U-Boot build.
Signed-off-by: James Balean <james@balean.com.au>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
We want to use SPDX identifier for license strings as much as possible.
SPDX short identifier for GPLv2/GPLv2+ is GPL-2.0/GPL-2.0+.
This change is done by using following command.
find . -name "*.mk" | xargs sed -ri '/LICENSE( )?[\+:]?=/s/\<GPLv2\>/GPL-2.0/g'
Signed-off-by: Rahul Bedarkar <rahulbedarkar89@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
On older SoCFPGA SoCs, there was not enough SRAM to fit the entire
U-Boot, so a SPL model was used. The SPL was therefore the binary that
had to be "prepared" to be loaded by the ROM code using the mkpimage
tool.
With newer SoCFPGA SoCs, there is enough SRAM to fit the entire U-Boot,
and therefore the ROM code directly loads U-Boot. In this case, it's the
real U-Boot image (not the SPL) that needs to be prepared using
mkpimage.
This code adds support for the newer SoCFPGA SoCs, by adjusting the
mkpimage related logic to apply on the SPL if an SPL is enabled, or on
the full U-Boot image otherwise.
Signed-off-by: Lionel Flandrin <lionel@svkt.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
When generating the environment image the target endianess should
be taken in account for CRC calculation purposes. For big endian
targets the -b flag should be passed to the mkenvimage tool.
Signed-off-by: Tiago Brusamarello <tiago.brusamarello@datacom.ind.br>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Expose the Kconfig-related help commands when U-Boot uses the Kconfig
configuration. Like others (like Linux, barebox, busybox), only expose
menuconfig, not all the configurators.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Some U-Boot board configurations have CONFIG_FIT_SIGNATURE=y. In this
case, when U-Boot builds its tools, it requires OpenSSL support on the
host system.
Since we clearly don't want to unconditionally depend on host-openssl,
we introduce a new option to explicitly enable the dependency on
host-openssl. This is exactly identical to the existing
BR2_TARGET_UBOOT_NEEDS_DTC, for the dependency on host-dtc. It is
therefore the responsibility of the user to enable this option if his
board configuration uses CONFIG_FIT_SIGNATURE=y.
Necessary to fix bug #9316.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Since commit fad58cefa4 ("boot/uboot: allow to build multiple U-Boot
images") the installation of SPL binary fails.
For example, when building the mx6cubox_defconfig target we see:
LD u-boot
OBJCOPY u-boot-nodtb.bin
COPY u-boot.bin
MKIMAGE u-boot.img
>>> uboot 2016.09.01 Installing to target
>>> uboot 2016.09.01 Installing to images directory
cp -dpf /home/fabio/buildroot/output/build/uboot-2016.09.01/u-boot.bin /home/fabio/buildroot/output/images/
cp -dpf /home/fabio/buildroot/output/build/uboot-2016.09.01/u-boot.img /home/fabio/buildroot/output/images/
cp -dpf /home/fabio/buildroot/output/build/uboot-2016.09.01/SPL /home/fabio/buildroot/output/images/
cp: cannot stat '/home/fabio/buildroot/output/build/uboot-2016.09.01/SPL': No such file or directory
Instead of calling 'make all' only for the BR2_TARGET_UBOOT_FORMAT_DTB_IMG
case, call 'make all' unconditionally so that the SPL target can also
be installed.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Sometimes it is desired to build multiple U-boot images. E.g. one to
save into flash memory and one for serial load. So far this was not
possible.
This change allows to select any combination of the target formats. They
are all copied to the image folder.
Signed-off-by: Petr Kulhavy <brain@jikos.cz>
[Thomas:
- Handle the BR2_TARGET_UBOOT_FORMAT_BIN, which wasn't handled, and
therefore u-boot.bin was not copied when
BR2_TARGET_UBOOT_FORMAT_BIN=y.
- Rename UBOOT_BIN to UBOOT_BINS, since it can now contain multiple
values.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
There was a typo in commit
b05ff12b6c ("uboot: install multiple spl
images"), leading to a missing closing parenthesis. This commit fixes
this typo.
Fixes bug #9086
Reported-by: Jebodiah Sensai <dkaplan65@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
For some platforms, there are multiple generated spl images. Extend
BR2_TARGET_UBOOT_SPL_NAME to allow these multiple images to be installed
after uboot build completes.
For example, the NextThingCo C.H.I.P. uses two binaries from uboot,
spl/sunxi-spl.bin and spl/sunxi-spl-with-ecc.bin.
Signed-off-by: Jason Abele <jason@nextthing.co>
[Maxime:
- Add foreach loop for general case and mkpimage
- Use firstword for zynq case]
Signe-off-by: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Since commit 0dca644e44 ("boot/uboot: fix
missing host-openssl for i.MX28 target"), we pass HOSTCFLAGS/HOSTLDFLAGS
in the environment of U-Boot when building. This is needed to allow
U-Boot to find the OpenSSL headers/libraries when they are
needed. Unfortunately, this breaks the build with old U-Boot versions as
the U-Boot Makefiles were not designed to have HOSTCFLAGS passed in,
which causes some important CFLAGS from the U-Boot build system to be
ignored.
As suggested by Arnout, we pass the HOST_CFLAGS inside HOSTCC directly,
which allows to pass the CFLAGS without overriding the internal U-Boot
CFLAGS.
Tested with an old U-Boot (2012.10), and a modern U-Boot in a
configuration that needs OpenSSL.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
By default position independent executables (PIE) are generated
when building U-Boot elf target. MetaWare debugger doesn't support
PIE (position-independent executable).
In order to allow MDB load and run U-Boot elf, we need to do a
special trick, called "mdbtrick".
This special build target is used to fake generated U-Boot elf by:
1. Reset PIE flag in ELF header
2. Strip all debug information from elf
Signed-off-by: Zakharov Vlad <vzakhar@synopsys.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Allow multiple file names to be listed in
BR2_TARGET_UBOOT_ENVIMAGE_SOURCE, concatenating them in the order
listed.
This allows the bulk of the environment to be shared across multiple
boards using a common environment file with board-specific values
supplied in a secondary environment source file.
Signed-off-by: Cam Hutchison <camh@xdna.net>
[Thomas: adjust indentation in the .mk file.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Building an U-Boot image for the i.MX23 or i.MX28 target requires to run the
bootloaders 'mxsimage' tool on the host. As mxsimage needs unconditionally
OpenSSL, building U-Boot for those targets fails if it is not available on
the host:
tools/mxsimage.c:18:25: fatal error: openssl/evp.h: No such file or directory
#include <openssl/evp.h>
Add the required dependency 'host-openssl' to all the different U-Boot image
types used to build a bootloader image for an i.MX23/i.MX28 target.
Also pass HOST_CFLAGS and HOST_LDFLAGS to the U-Boot build process so the right
-I/-L options will be used to find OpenSSL.
Ported from the Armadeus project:
https://sourceforge.net/p/armadeus/mailman/message/33595402/
Signed-off-by: Julien Boibessot <julien.boibessot@armadeus.com>
[Jörg: port to recent Buildroot version]
Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
u-boot-dtb.img only gets built by default (all target) if
CONFIG_OF_SEPARATE _AND_ CONFIG_SPL_FRAMEWORK are enabled.
Certain SoCs (E.G. Action Semi S500) use a proprietary first level
bootloader instead of u-boot SPL, but still use u-boot-dtb.img as the first
level bootloader parses the uImage header for size/loadaddr.
Ensure u-boot-dtb.img gets built if enabled by explicitly listing it as a
u-boot make target (next to all) to support such setups.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Jan Viktorin <viktorin@rehivetech.com>
[Thomas: add Altera in the option name and description, drop reference
to Go being needed and to Maxime Hadjinlian's version of mkpimage
since a C version is now used.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
It's been deprecated for a year now so remove it.
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Commit 16b8e813c8 removed all remaining users
of helper function insert_define.
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
make legal-info breaks when using an older u-boot version in local.mk
with OVERRIDE_SRCDIR, due to the reorganization of license files which
happened in u-boot v2013.10.
This issue had already been fixed in Buildroot for the regular use of
old u-boot versions (non-local.mk).
This patch adds the same fix to UBOOT_POST_RSYNC_HOOKS so that it also
covers the local.mk case.
Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
For a 64bit arm architecture, Buildroot uses arm64 terminology and
from the top-level Makefile KERNEL_ARCH is set to arm64 which is then
passed to the uboot build. This causes a compilation issue as uboot
uses the top-level system architecture as it's $(ARCH). So
arch/$(ARCH)/Makefile doesn't work with arm64 unless we adjust the
arch.
[Thomas:
- rewrap commit message text.
- simplify comment in the code.]
Signed-off-by: Ronak Desai <ronak.desai@rockwellcollins.com>
Signed-off-by: Matt Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Some U-Boot configurations require the Device Tree compiler to be
available, so we need to depend on host-dtc (example configuration:
zynq_zed).
However, we don't want to build it unconditionally, since the vast
majority of U-Boot configurations don't need it (and host-dtc itself
has a bunch of dependencies).
So, we simply add a Config.in option that allows users to indicate
whether their U-Boot needs DTC or not, and depend on host-dtc if this
option is enabled.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
With the patchset "kconfig: turnaround into single .config"
[http://lists.denx.de/pipermail/u-boot/2015-February/205490.html]
U-Boot switched to a single .config file for board configuration. This
allows us to use the kconfig-package infrastructure.
For providing backward compatibility with older U-Boot version a user
choice between the new Kconfig and the legacy build system is
introduced.
[Thomas:
- make use of the legacy build system the default, to not break
existing configurations.
- add some comments in the code checking all the configuration
options, in order to hopefully make it a bit clearer.]
Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit integrates generation of a bootable image
for Xilinx Zynq. The generation is independent on Xilinx
flow and utilizes the host-zynq-boot-bin package. The only
required step is to generate a proper U-Boot SPL (instead
of the FSBL).
The SPL generation might work when providing the working
ps7_init.c file to U-Boot. However, from U-Boot 2015.07
a set of generic ps7_init.c files is included and used to
build the U-Boot SPL for various boards. The ps7_init.c file
has been released under GNU/GPL license for this purpose.
For details, see
http://lists.denx.de/pipermail/u-boot/2015-April/210664.html
The SPL searchs for u-boot-dtb.img when booting so we
enforce using of the BR2_TARGET_UBOOT_FORMAT_DTB_IMG format.
[Thomas: remove select of BR2_PACKAGE_HOST_ZYNQ_BOOT_BIN, since this
option no longer exists.]
Signed-off-by: Jan Viktorin <viktorin@rehivetech.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Allow to generate u-boot-dtb.img. This is the same format
as u-boot.img, however, it contains a built-in device-tree.
This file is being loaded by the U-Boot SPL.
Signed-off-by: Jan Viktorin <viktorin@rehivetech.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Allow to generate 'u-boot.nand', Freescale i.MX28 BootStream format (.sb)
with a header for booting from NAND flash.
There are two possibilities when preparing an image writable to NAND flash:
1) The NAND was not written at all yet or the BCB (Boot Control Blocks) is
broken. In this case, the NAND image 'u-boot.nand' needs to written.
2) The NAND flash was already written with a good BCB. This applies after
'u-boot.nand' was correctly written. There is no need to write the BCB
again. In this case, the bootloader can be upgraded by writing 'u-boot.sb'.
To satisfy both cases 'u-boot.nand' as well as the make target 'u-boot.sb' are
copied to the binaries directory.
mxsboot for NAND images needs all three parameters typed in as integer values
(hex values do not work). The default values choosen are typical sizes for a
NAND flash.
For more information see:
http://www.denx-cs.de/doku/?q=m28evkrunuboot
Commit Note: This patch is based on top of
"[PATCH v2 1/2] boot/uboot: add support for i.MX28 SD format"
http://patchwork.ozlabs.org/patch/453116/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
It's been deprecated since the 2014.05 release, so a year has passed.
Add legacy info as well to raise a warning when it's used.
[Peter: Remove entire config.h fixup handling]
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
For custom tarballs, it's quite obvious we can not check hashes.
For custom versions, that's not so obvious. One might think we could
have hashes for all the official releases, but that's not possible: if
the user uses a released version of Buildroot (say 2015.05) much later
in the future, and wants to use the then-released 2038.02 U-Boot. It now
seems pretty obvious that Buildroot 2015.02 can't know the hash for
U-Boot 2038.02.
So, disable checking the hash for custom tarballs and custom versions.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Vincent Stehle <vincent.stehle@laposte.net>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Instead of manually testing MAKECMDGOALS, use the newly introduced
BR_BUILDING variable to know if we're building or not.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
The existing u-boot patch option only allowed directories to be
specified. This adds support for URLs using similar code as found
in linux/linux.mk. Local files are also handled now.
This change is useful for Intel Edison support, so that Intel's u-boot
patch can be downloaded rather than stored in the Buildroot source tree.
Signed-off-by: Frank Hunleth <fhunleth@troodon-software.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
[Thomas: fix issues noticed by Arnout:
- Rewrap the linux/Config.in paragraph
- Revert the "is a toolchain dependency" -> "has a toolchain
dependency" change from pkg-generic.mk, as the original was
correct.]
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Several packages have some logic to apply custom patches that existed
before the BR2_GLOBAL_PATCH_DIR mechanism: at91bootstrap,
at91bootstrap3, barebox, uboot and linux. Currently, the logic of
those packages to apply custom patches is to match
<package-name>-*.patch, which is not consistent with what we've done
for patches stored in the package directory, and for patches stored in
BR2_GLOBAL_PATCH_DIR: in such cases, we simply apply *.patch.
Therefore, for consistency reasons, this commit changes these packages
to also apply *.patch.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Allow to generate u-boot.sd, Freescale i.MX28 SB format with a header for
booting from an SD card.
U-boot includes an mxsboot tool to generate this format, starting from
v2011.12.
See u-boot doc/README.mxs (or doc/README.mx28_common before 2013.07).
[Arnout:
- Wrap Config.in help text at 72 columns.
- Remove v from U-Boot version specifier.
- Refer to different README name before 2013.07.
- Depend on host-elftosb
- Add comment to clarify sb -> sd conversion.]
Signed-off-by: Vincent Stehlé <vincent.stehle@freescale.com>
Tested-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Reviewed-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This flag seems to be obsolete. There is no piece of code in the U-Boot source
tree referencing CONFIG_NOSOFTFLOAT.
Unfortunatly the use of this flag is not documented here. Maybe it's about this
old workaround:
http://lists.denx.de/pipermail/u-boot/2007-March/020282.html
However, this patch has been declined:
http://www.denx.de/wiki/view/U-Boot/PatchStatus?rev=1.27
Since no other configure options are used, remove also UBOOT_CONFIGURE_OPTS.
Signed-off-by: Jörg Krause <jkrause@posteo.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Remove the quotes from the BR2_TARGET_UBOOT_SPL_NAME variable.
Signed-off-by: Jörg Krause <jkrause@posteo.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To easy up adding optional parameters when calling the
"apply-patches.sh" add and use the "APPLY_PATCHES" variable to execute
the script.
Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
The Buildroot coding style defines one space around make assignments and
does not align the assignment symbols.
This patch does a bulk fix of offending packages. The package
infrastructures (or more in general assignments to calculated variable
names, like $(2)_FOO) are not touched.
Alignment of line continuation characters (\) is kept as-is.
The sed command used to do this replacement is:
find * -name "*.mk" | xargs sed -i \
-e 's#^\([A-Z0-9a-z_]\+\)\s*\([?:+]\?=\)\s*$#\1 \2#'
-e 's#^\([A-Z0-9a-z_]\+\)\s*\([?:+]\?=\)\s*\([^\\]\+\)$#\1 \2 \3#'
-e 's#^\([A-Z0-9a-z_]\+\)\s*\([?:+]\?=\)\s*\([^\\ \t]\+\s*\\\)\s*$#\1 \2 \3#'
-e 's#^\([A-Z0-9a-z_]\+\)\s*\([?:+]\?=\)\(\s*\\\)#\1 \2\3#'
Brief explanation of this command:
^\([A-Z0-9a-z_]\+\) a regular variable at the beginning of the line
\([?:+]\?=\) any assignment character =, :=, ?=, +=
\([^\\]\+\) any string not containing a line continuation
\([^\\ \t]\+\s*\\\) string, optional whitespace, followed by a
line continuation character
\(\s*\\\) optional whitespace, followed by a line
continuation character
Hence, the first subexpression handles empty assignments, the second
handles regular assignments, the third handles regular assignments with
line continuation, and the fourth empty assignments with line
continuation.
This expression was tested on following test text: (initial tab not
included)
FOO = spaces before
FOO = spaces before and after
FOO = tab before
FOO = tab and spaces before
FOO = tab after
FOO = tab and spaces after
FOO = spaces and tab after
FOO = \
FOO = bar \
FOO = bar space \
FOO = \
GENIMAGE_DEPENDENCIES = host-pkgconf libconfuse
FOO += spaces before
FOO ?= spaces before and after
FOO :=
FOO =
FOO =
FOO =
FOO =
$(MAKE1) CROSS_COMPILE=$(TARGET_CROSS) -C
AT91BOOTSTRAP3_DEFCONFIG = \
AXEL_DISABLE_I18N=--i18n=0
After this bulk change, following manual fixups were done:
- fix line continuation alignment in cegui06 and spice (the sed
expression leaves the number of whitespace between the value and line
continuation character intact, but the whitespace before that could have
changed, causing misalignment.
- qt5base was reverted, as this package uses extensive alignment which
actually makes the code more readable.
Finally, the end result was manually reviewed.
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Cc: Yann E. Morin <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Following the issues reported by Jerry <g4@novadsp.com>, it appears
that there are a number of U-Boot configuration variables we are not
checking properly, leaving users with weird behavior at build time.
This commit extends the existing U-Boot checks to verify that when a
custom version, custom tarball, or custom Git or Mercurial
repositories are selected, the appropriate fields are not empty in the
configuration.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Fixes#6986
Prior to u-boot 2013.10, the GPL license text was stored in COPYING and not
Licenses/gpl-2.0.txt, breaking legal-info.
Work around it by simply copying the file from the old location to the new
if present.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Some boards are configured in u-boot to store multiple redundant copies of
the environment image in flash. For these boards, it is required to pass
the -r flag, when generating a boot environment image using mkenvimage.
Signed-off-by: Simon Dawson <spdawson@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
